Die



Oct. l5, 1935. E M. MURPHY 2,017,373

DIE

Filed Ag, 28l 1933 lwenfo': 50W/QED f7. NUE/@HK Patented Oct. 15, 1935 UNHTE ST'E'S PAT OFFIQE DIE Application August 28, 1933, Serial No. 687,183

1 Claim.

This invention relates to dies and particularly to dies used in cold drawing material of square and rectangular section, although not limited thereto.

In the cold drawing of shapes, the dies in contact with the work-piece must be of an unusually high quality of wear-resistant material or the necessary processing cannot be accomplished. If the entire die is made of wear-resistant material, considerable expense is involved.

One object of the present invention is the provision of a novel die for cold drawing shapes, such as squares and rectangles, that will be cheap and easy to manufacture and very durable in service.

Another object is to provide a novel cold drawing die which may be readily adjustable for processing various sizes of material and one having high quality contact surfaces with body portions of considerably cheaper material.

These and further objects will be apparent after referring to the drawing, in which:

Figure 1 is a front elevation of the device of the invention which is shown partly in section.

Figure 2 is a View on the line Il-II of Figure l, showing a part of the device in section.

Figure 3 is a sectional view on the line III- III of Figure 1.

Referring more particularly to the drawing, the numerals 2 and 3 designate a pair of elongated cylinders having centrally disposedicircular inserts 2EL and 3a, respectively, which are composed of a suitable wear-resistant alloy. A pair of con- 'siderably shorter cylinders 'A and 5 are provided with diametrically opposed wear-resistant alloy inserts la and 53a, respectively, and are each further provided with two grooves at right angles on each of their ends, as at lb and 5b, respectively, of such shape as to conform to the contour of the elongated cylinders 2 and 3.

All of the inserts of the various cylinders, 2e, 3a, 4a and 5a', are ush with the contours of their supporting bodies 2 3, 4 and 5, respectively.

Referring to Figure 1 of the drawing, the cylinders l and 5 are disposed intermediate the elongated cylinders 2 and 3 with the contours of the latter seated within one of the grooves 4b and 5b on each of the ends of the former, in such manner as to permit an opening composed only of the material of the wear-resistant inserts of the various elements.

ln operation, the die is used until wear accrues to the various contact surfaces, whereupon the 10 cylinders 2 and 3 maybe separated, the cylinders i and 5 rotated 90 degrees on their axes, the elongated cylinders 2 and 3 likewise rotated 90 degrees, and the various elements reassembled, permitting an entire change of the various wear-resistant inserts.

While I have shown and described one specific embodiment of my invention, it will be understood that I do not wish to be limited exactly thereto, since various modifications may be made without departing from the scope of my invention, as defined in the following claim.

I claim:

A die comprising a pair of spaced elongated cylinders arranged with their axes in parallelism,

a continuous annular wear-resistant insert carried by the intermediate portion of each of said elongated cylinders, a pair of spaced and substantially shorter cylinders disposed intermediate said elongated cylinders, the axes of said substantially shorter cylinders being parallel with respect to each other but at right angles with respect to the axes of the said elongated cylinders, and diametrically opposite non-continuous wear-resistant inserts carried by each of said substantially shorter cylinders, the ends of said substantially shorter cylinders being grooved at right angles to conform to the contour of said elongated cylinders whereby an interlocking construction is provided.

EDWARD M. MURPHY. 

